rename events package, add aggregat superclass

src/main/java/mops/gruppen2/services/SerializationService.java

@@ -0,0 +1,10 @@
+package mops.gruppen2.services;
+
+import org.springframework.stereotype.Service;
+
+/**
+ * Übersetzt und baut
+ */
+@Service
+public class SerializationService {
+}